Added a check for a duplciate user in the manage create user page.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@650 f5dc347c-c33d-0410-90a0-b07cc1902cb9

doc/ChangeLog

@@ -30,6 +30,7 @@ Mantis
  * Added support to move bugs from one project to another.
  * Added email check to admin_check.php3
  * Added a check to make sure the cookie_string really is unique.
+ * Added a check for a duplciate user in the manage create user page.
  * Removed site_settings pages.
  * Removed unused cookie variables.
  * Removed sql_to_unix_time() function.  Unecessary with removal of TIMESTAMPS.

manage_create_new_user.php

@@ -10,6 +10,17 @@
 	db_connect( $g_hostname, $g_db_username, $g_db_password, $g_database_name );
 	check_access( ADMINISTRATOR );
 
+	# Check for duplicate username
+	$query = "SELECT username
+		FROM $g_mantis_user_table
+		WHERE username='$f_username'";
+    $result = db_query( $query );
+    if ( db_num_rows( $result ) > 0 ) {
+    	PRINT "$f_username $s_duplicate_username<p>";
+		PRINT "<a href=\"$g_manage_create_user_page\">$s_proceed</a>";
+    	exit;
+    }
+
 	if ( $f_password != $f_password_verify ) {
 		echo "ERROR: passwords do not match";
 		exit;